Meanings of unusual changes in English

The team have got some unusual changes to ring-it'sgoing to require their full attention.

I don't know about the rest of you, but we've noticed some... unusual changes in behavior.

And yet, in spite of these unusual changes, the Commission has a record perhaps unrivalled among international commissions.

Usually, the PSM is activated by some unusual changes of the external reality (powerful noises, mechanical shocks...).

Patients of any age who start taking antidepressants should be monitored for worsening depression, suicidal actions or unusual changes in behavior, FDA officials said.